following data represent the distribution of electrons, protons and neutrons in atoms of four elements A,B,C,D
ELEMENTS
A B
PROTONS 9
16
12
NEUTRONS
10
16
12
ELECTRONS
9
16
12
6
D
17
22
17
Answer the following questions:
i) Give the electronic distribution of element B.
ii) Write the valency of element A. iii) What is the atomic number of element C?
iv) Give the mass number of element D.
v) Is element Ca metal or nonmetal?
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